What version of AB are you using? The newest version is: v4.1.0.7013. If you already have this version installed and the fan settings in-place, I'm not sure what else may be preventing your setup from running as advertised per your settings. Perhaps, doing an uninstall and reninstall of AB and try it again perhaps.
I've found some interesting reads as well... I'm not sure what GPU you have, but in the case of the MSI GTX 970 (for example) there have been official MSI BIOS updates released to "fix" fan issues with first/early release versions. These "fixes" have also apparently addressed those who were having fan profile issues in AB. The attached is just an example...